Boris Johnson Launches Video Campaign In London Mayoral Race - Boris Johnson launches mayoral campaign on ‘Speakers Corner online’ Friction.tv. To mark the start of the official campaign period for the London Mayoral elections, Boris Johnson has chosen Friction.tv to host a series of individual video debates on his policies. The site will be used by the Back Boris Campaign Team as a platform for Boris to outline his policies and Mayoral manifesto and most importantly to invite Londoners to have the right to reply through video.